Method LoadAssetChunk

Source/Engine/Content/Storage/FlaxStorage.cpp:711–804

}

bool FlaxStorage::LoadAssetChunk(FlaxChunk* chunk)
{
    PROFILE_MEM(ContentFiles);
    ASSERT(IsLoaded());
    ASSERT(chunk != nullptr && _chunks.Contains(chunk));

#if PLATFORM_THREADS_LIMIT > 1
    // Protect against loading the same chunk from multiple threads at once
    while (Platform::InterlockedCompareExchange(&chunk->IsLoading, 1, 0) != 0)
        Platform::Sleep(1);
    SCOPE_EXIT{ Platform::AtomicStore(&chunk->IsLoading, 0); };
#endif
    if (chunk->IsLoaded())
        return false;

    // Ensure that asset is in a file
    if (chunk->ExistsInFile() == false)
    {
        LOG(Warning, "Cannot load chunk from {0}. It doesn't exist in storage.", ToString());
        return true;
    }

    LockChunks();

    // Open file
    auto stream = OpenFile();
    bool failed = stream == nullptr;
    if (!failed)
    {
        // Seek
        stream->SetPosition(chunk->LocationInFile.Address);

        if (stream->HasError())
        {
            // Sometimes stream->HasError() from setposition. result in a crash or missing media in release (stream _file._handle = nullptr).
            // When retrying, it looks like it works and we can continue. We need this to success.

            for (int retry = 0; retry < 5; retry++)
            {
                Platform::Sleep(50);
                stream = OpenFile();
                failed = stream == nullptr;
                if (!failed)
                {
                    stream->SetPosition(chunk->LocationInFile.Address);
                    if (!stream->HasError())
                        break;
                }
            }
        }

        if (!stream || stream->HasError())
        {
            failed = true;
            UnlockChunks();
            LOG(Warning, "SetPosition failed on chunk {0}.", ToString());
            return failed;
        }